[Question] What is the purpose of Head.js in the application?

[novabyte]

Thank you for putting together a great example of how to use RequireJS with Angular. I'm a big fan of r.js and was having trouble finding resources that demonstrated the two together.

I'm trying to understand why Head.js is used with RequireJS to load Angular? What are the disadvantages of using RequireJS directly?

(Sorry, I know that the issue tracker is a bad place to ask Qs but I wasn't sure where else to ask about this.)